Image from bywayofbicycle.com
So you've gotten more confident on your bike. You're ready for the next step, cycling shoes and clipless pedals.
What are they you ask? Basically these are just cycling specific shoes that attach to pedals for a more efficient way of transferring power from your legs to the bike. Instead of your foot flopping about, slip sliding on the pedals, you clip into the pedals this time for a more secure fit. Are they necessary? It really depends is the best answer I can come up with. One thing for sure though is that in terms of efficiency, they are a must (just look at all the Tour de France pros, all use one form of clipless system or the other).
Getting used to the clipless sytem takes time and practice though. The more you practice, the more confident you become until clipping in and unclipping becomes second nature.
Here's a short article from Wikihow on how to get more confident in using clipless bike pedals.
Remember, practice makes perfect (and much less road rash, haha).